National Transport Library Research Database

EuropeTrain – fältstudier av hjulslitage orsakade av LL-bromsblock (EuropeTrain)

  • Gräber, Johannes
  • International Union of Railways (UIC), Internationell organisation
Sponsors, duration, budget: Trafikverket ; 2012-01-31 -- 2012-12-31 ; 400000 kronorRegistration number:
  • Trafikverket 2010/56654
Subject(s): Abstract: Projektet förväntas resultera i en rekommenderad profil på LL-bromsblock för att minimera slitage på hjul. Resultaten presenteras i en rapport under andra halvan av 2012. För att få fram underlag till rekommenderad hjulprofil görs fältförsök med LL-block. Testkörningar utförs i olika delar av Europa under ett år. Körningarna görs i Sverige vintertid för att få med vinteraspekten. Syfte: Att optimera profilen för bromsblock av kompositmaterial för att minska slitage på hjul. Huvudsyftet ät att sänka buller vid källan, det vill säga kontakten hjul – räl, genom att byta ut traditionella bromsblock av gjutjärn mot bromsblocka av kompositmaterial. Tillsammans med de åtgärder som Trafikverket gör på infrastrukturen ger åtgärder på fordonen förbättrade förutsättningar att minska buller mot järnvägssystemets omgivning. Bakgrund: LL-bromsblock kan vara en kostnadseffektiv lösning för att åtgärda buller vid källan för befintliga vagnar eftersom några modifieringar av vagnen inte behöver göras. Det finns dock en öppen fråga när det gäller slutgiltig certifiering av LL-block som rör hjulslitage. Dagens block leder till högt slitage och förändringar av hjulprofilen. Effektmål: Ökad tågtrafik ger ökat buller. Kan åtgärder göras för att minska buller från den ökande järnvägstrafiken leder det till en betydligt förbättrad närmiljö.Abstract: Noise reduction at the source (wheel-rail-contact) has the best cost/benefit ratio and avoids high investments and maintenance cost for infrastructure managers (e.g. noise barriers). To achieve a considerable noise reduction in rail freight traffic, retrofitting of existing wagons with composite brake blocks is essential. The EuropeTrain is the tool to considerably accelerate the solution process in synergy with the 2009 ""Synthesis Report on LL blocks"" and “Study on Equivalent Conicity”. The EuropeTrain's challenge is to concretely finalize the UIC members huge financial efforts that have been invested so far on the issue. Background / history: "Rail noise is on the top of the political agenda of the EC and noise related track access charges will likely be implemented Europe-wide within next decade (and noise ceilings probably as well later on). The EC expects results from the Sector and is pushing for an early start of a retrofitting program for existing fleets. Since mid of the 90s, UIC, CER and UIP run a common program on „Noise reduction of freight wagons through composite brake blocks“ for safe and economic operation on freight wagons which led to the approval of K blocks for the equipment of new Rolling Stock. Due to the long useful lifetime of wagons a considerable noise reduction cannot be achieved in mid-term. Consequently the development of the LL-blocks (a 1:1 replacement of cast iron brake blocks) started in 2002 with the EU funded project Euro Rolling Silently together with the participation of most of the European brake block manufacturers. This development so far only succeeded in a provisional certification of LL blocks in 2005. Since then, intensive dynamometer, slip brake and in-service tests have been performed with the results summarized in the “Synthesis report on LL-blocks” released in 2009 and continuing studies concerning the increase of ""Equivalent Wheel Conicity”. " Aims/means and expected results: "As a major result it is expected to have a recommendation for the block shape of LL blocks as a basis for retrofitting of the majority of the existing wagons. In details, the EuropeTrain: 1.has to serve as a tool to accelerate the solution process for the problem of equivalent conicity degradation by validating the effect of a new shape of block, proposed by the “Study on Equivalent Conicity” (B 126.13C) and reaching enhanced understanding of equivalent conicity limit values and effects on running behaviour (UIC SET 04) 2. has to deliver field experience on wear of block and wheel with LL blocks (LCC) on short term and of high quality. The following results are expected: 1. A validated new block shape, leading to reasonable inspection and reprofiling intervals for the wheels. 2. Validated new limit values for equivalent conicity taking into account the effects on running behaviour 3. Validated field experience data on wear of block and wheel with LL blocks (LCC) under various operational and climatic conditions The train will consist of about 30 wagons running throughout Europe .
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